The battery-flying-out-and-hitting-the-polycarb problem came about because the person responsible for making the brackets ingnored my instructions and only made them for widthways on the battery rather than widthways and lengthways, as a result, it slid out when the robot self-righted.
Anyway, I rigged up Ricochet for it's first test run:

Only a quick test run. It's running on the two old 5000mAh 12v NiMHs in the video, it will be upgraded to a 3S LiPo for the champs so it will run faster and have more torque. She has more ground clearance than before, so she won't get stuck on eveything. The rest of the parts (including all the 30mm HDPE bulkheads) are cut and ready to bolt on, but due to a calculation error, the motors need adjusting to fit it all on. There are plans afoot to make 3.2mm Hardox scoops for both ends before the champs, and also plans to upgrade the motors to 18v Gimsons GR02's and run them on a 6S LiPo. It will be crazy fast and have insane pushing power, and that's what the aim of the robot was in the first place!
PS. Someone fix that damn YouTube embedding problem, it's driving me mad!